Flexible hose



J.' MosELEY July 5, 1960 United States Patent Oce 2,943,644 Patented July 5, 1960 FLEXIBLE HOSE John Moseley, South Wimbledon, London, England, assignor to Compollex Company Limited, London, England Filed Feb. 1, 1957, Ser. No. 637,679

'6 Claims. (Cl. '138-56) This invention has for its object to provide a flexible hose for use in conveying liquid oxygen, nitrogen, argon and similar gases having an extremely low boiling point.

The hose according to the invention comprises a body including layers of polyethylene terephthalate, such as that marketed under the trade name Dacron, and layers of cloth woven from polyethylene terephthalate fibre. It is normal practice in the manufacture of ilexible hose for other purposes to bond together the layers of sheet material constituting the body of the hose. In the hose according to the invention, however, the constituent layers of the body of the hose are unbonded and are held together solely by means of internal and external wire armourings.

Two embodiments of exible hose according to the invention will now be described in more detail, by Way of example, with reference to the accompanying drawing, in which:

Fig. 1 is a side elevation, partly broken away, of the rst form of hose,

Fig. 2 is a section on the line II--II in Fig. 1,

Fig. 3 is a section on a greatly enlarged scale through the wall of the hose shown in Fig. l, and

Fig. 4 is a view similar to Fig. 3 showing the other form of hose.

Like reference numerals denote like parts throughout the figures.

'I'he hose shown in Figs. 1-3 comprises an inner helix of 12 gauge stainless steel wire, wound at Vz inch pitch, a body 11 and an outer helix 12 of 12 gauge stainless steel wire wound at V2 inch pitch with its turns situated between the turns of the inner helix 10. In manufacture, the inner helix 10 of wire is first wound on a mandrel, the constituent layers of sheet material constituting the body 11 of the hose are then wound in succession eonvolutely around the mandrel, and the outer helix 12 of wire is applied. The hose is then removed from the mandrel without curing and is ready for use as such.

The body 11 of the hose comprises two inner layers 13 of 12 ounce cloth woven from polyethylene terephthalate yarn, twenty layers 14 of polyethylene terephthalate iilm of thickness .0015 inch and two outer layers of 12 ounce cloth woven from polyethylene terephthalate cloth.

The hose shown in Fig. 4 is made in precisely the same way and dilers only in the construction of the body. This consists of two inner layers 13 of cloth and twenty layers 14 of lm identical with the corresponding layers in the hose shown in Fig. 3. Then OIIQW Single layer 16 of 12 ounce cloth Woven from polyethylene terephthalate yarn, ten layers 17 of polyethylene terephthalate lm of thickness .0015 inch and nally three outer layers 15 of cloth identical with that used for the outer layers of the hose of Fig. 3.

What I claim as my invention and desire to secure by Letters Patent is:

1. A iexible hose capable of conveying liquid oxygen without loss of flexibility or emb-rittlement and consisting of a tubular body of polyethylene terephthalate constituted by at least one inner layer of cloth woven from polyethylene terephthalate yarn and wound in overlapping helical coils, a number of intermediate layers of polyethylene terephthalate lilm wound in overlapping helical coils and at least one outer layer of cloth woven from polyethylene terephthalate yarn and wound in overlapping helical coils, and external and internal armourings of metal wire fitted closely to said body and holding the constituent layers thereof together.

2. A hose according to claim 1, comprising two inner layers of cloth and two outer layers of cloth.

3. A hose according to claim 2, wherein each cloth layer is of l2 ounce cloth and comprising twenty layers of lm, each of .0015 inch thickness.

4. A hose according to claim 1, wherein at least the inner wire armouring is of stainless steel.

5. A llexible hose capable of conveying liquid oxygen without loss of flexibility or embrittlement and consisting of a tubular body of polyethylene terephthalate constituted by a plurality of inner layers of cloth woven from polyethylene terephthalate yarn and wound in overlapping helical coils, a plurality of intermediate layers of polyethylene terephthalate iilm wound in overlapping helical coils, said intermediate lm layers being divided into two groups having sandwiched between them a. layer of cloth woven from polyethylene terephthalate yarn and Wound in overlapping helical coils, and a plurality of outer layers of cloth woven from polyethylene terephthalate yarn and wound in overlapping helical coils, and external and internal armourings of metal wire fitted closely to said body and holding the constituent layers thereof together.

6. A flexible hose capable of conveying liquid oxygen without loss of flexibility or embrittlement and consisting of a tubular body of polyethylene terephthalate constituted by at least one tubular layer of cloth woven from polyethylene terephthalate yarn, a number of intermediate tubular layers of polyethylene terephthalate lm and at least one outer tubular layer of cloth woven from polyethylene terephthalate yarn, and external and internal armourings of metal wire tted closely to said body and holding the constituent layers thereof together.

References Cited in the ile of this patent UNITED STATES PATENTS 86,652 Davis Feb. 9, 186.9 2,512,433 Leben June 20, 1950 2,650,213 Hofrichter Aug. 25, 1953 2,739,089 Hageltorn Mar. 20, 1956 FOREIGN PATENTS 25,977 Great Britain Nov. 23, 1907 591,307 Great Britain Aug. 13, 1947 `627,054 Great Britain `luly 27, 1949 

1. A FLEXIBLE HOSE CAPABLE OF CONVEYING LIQUID OXYGEN WITHOUT LOSS OF FLEXIBILITY OF EMBRITTLEMENT AND CONSISTING OF A TUBULAR BODY OF POLYETHYLENE TEREPHTHALATE CONSTITUTED BY AT LEAST ONE INNER LAYER OF CLOTH WOVEN FROM POLYETHYLENE TEREPHTHALATE YARN AND WOUND IN OVERLAPPING HELICAL COILS, A NUMBER IF INTERMEDIATE LAYERS OF POLYETHYLENE TEREPHTHALATE FILM WOUND IN OVERLAPPING HELICAL COILS AND AT LEAST ONE OUTER LAYER OF CLOTH WOVEN FROM POLYETHYLENE TEREPHTHALATE YARN AND WOUND IN OVERLAPPING HELICAL COILS, AND EXTERNAL AND INTERNAL ARMOURINGS OF METAL WIRE FITTED CLOSELY TO SAID BODY AND HOLDING THE CONSTITUENT LAYERS THEREOF TOGETHER. 